探地雷达在甲基卡稀有金属矿田找矿的应用

The application of ground-penetrating radar to ore exploration in the Jiajika rare metal orefield

在四川甲基卡矿田新发现了超大型X03号锂矿化伟晶岩脉,在勘探过程中,首次使用探地雷达探测甲基卡矿田浅层地质结构。通过分析对比探地雷达模拟实验数据、实测探地雷达剖面、钻孔数据和便携式取样钻数据,发现探地雷达图像能有效反映矿田第四系浮土覆盖区浅层地质结构。本次研究还鉴别了酸性岩脉体或转石与第四系浮土、片岩等围岩之间界面的探地雷达信号特征,并利用探地雷达对X03号矿脉等隐伏脉体进行了揭盖,获得了矿脉浅部结构构造信息。通过本次研究,发现并证明探地雷达勘探稀有金属矿脉是有效的,能够代替槽探,实现绿色勘探和快速找矿评价。

A superlarge X03 rare metal vein has been recently discovered in the Jiajika orefield in western Sichuan.In the exploration,the ground-penetrating radar(GPR)was used to probe into shallow geological structures in the Jiajika orefield for the first time.By analyzing and comparative study of the model simulation,the measured GPR profile and the drilling data,it is found that the GPR image can effectively reveal the shallow geological structures beneath the Quaternary soil in this orefield.The characteristics of different reflections from the boundaries between acidic veins or boulders and their wall rocks,such as schist or Quaternary soil,were identified;by using the GPR method,the geological features at the top of the concealed X03 and other lithium veins were uncovered.Through this study,it is found that GPR detection is an effectively way to explore rare metal veins,which can replace the shallow trenching method and achieve green exploration as well as rapid prospecting and evaluation.